Regulator and cut-out relay for dynamos



Filed May 2, 1933 v Patented Dec. 18, 1934 UNITED STATES PATENT OFFICE REGULATOR AND CUT-OUT RELAY FOR DYNAMOS Jakob Bohli, Solothurn, Switzerland Application May 2, 1933, Serial No. 669,018 In Germany May 13, 1932 2 Claims. (Cl. 171-313) The invention relates to a generator battery of the cut-out relay by varying the sizes of the charging system. In known systems of this kind, resistance R1. By arranging between point A the series winding of the regulator has been cOnand point N the series winding D in parallel to nected in series with the series winding of the the series winding B of the cut-out relay and to 5 cut-out relay. Such relays are designed for a the resistance R2 and connecting the load devices 5 certain value of the current to be transmitted; to a point between the series winding B and f r re t r val e of h cu ren a l r r yp r the resistance R2 the following effect is attained: lay must be used; therefore by connecting the se- The voltage of the dynamo is normally so reguries winding of the regulator and the series windlated that the tt i charged t voltage of 10 ing of the cut-out relay in series to each other, it the dynamo which is not detrimental f the 10 is necessary to provide for each larger relay type fiery If now in t arrangement according to a larger regulator 0011, which means an epprecithis invention the load devices are switched in, the able disadvantage from a manufacturing standvoltage of t dynamo d t drop down so far D that the battery is discharged across the load Further, in such systems the 103d devices were device and for the reason of having the re.. C e t d d e y to the battery; h the lead sistance R2 of a predetermined size. If the load devices were switched in, a considerable drop of devices were connected to point N without t Voltage of the dynamo took place and as a result posing a resistance R2, the voltage drop of the f this a hi h di h r f h t ry; to p v dynamo would be considerably higher when this, e voltage of the dynamo has to be s switching in the load devices. Either a discharge 20 la ed o a higher degree, so that when switching of the battery would take place in this case, or the in the load devices the voltage of the dynamo revoltage of t dynamo t b reglllated to such a, mained above t e v t e o t y; this 011 value that the same remains still above the one of its turn had the disadv nta e that the battery the battery when switching in the load devices;

a ter swi hin out the l ad d v s W charged this has the disadvantage that the battery aiter 25 at too h h a VO -E the load devices being switched out is charged at According to the Subject of the Present ihveh a voltage which is too high. The reason that the tion the series winding of the regulator is arvoltage of t dynamo d not go o far down in ranged between the contact piece 0f the Cut-Out case the load devices are switched in at the point 3 (dynamo) and the point to which the 0 instead of switching in at point N is the follow- 30 tery is connected, in parallel to the series winding ing: If the load devices are switched in at point O,

01' the cut-out relay and to a resistance which is th t, flowing through the coil D is smaller in series to t e latt Winding; a fesistahcfi -D than for the case of switching in the load devices blc of being regulated Provided in Series to the at the point N, as in the former casein the circuit Seri s wi d of the regulator, and the load of the coil D the resistance of this coil and the 35 Vices are switched in between the series winding resistance R2 are provided in the latter case how- 0f the cut-Out re y and the resistance which is ever, the resistance of the coil D only. When the in Seri s t t e t load devices are switched in at the point 0, the

On t a panyi g d aw & constructional effect of the coil D with respect to the contact 40 form 01' the invention is schema ic y shown- A points G is smaller, i. e. the voltage drop is smaller 40 is the contact piece of the cut-out relay, the latter t in th case i hich th load devices are being under the i fl of the s s Winding B switched in at the point N; in the latter case, the and the volta Winding D 18 the Series Wihdeffect of the coil D is greater, as more current is ing, E the voltage winding and F the demagnetizflgwing through the latter.

ing winding of the regulator. G represents the wh t I claim is: 45 contact of the regulator. His the field winding of 1. In a generator battery charging system, in the dynamo andJ the armature, K represents the bination a dynamo, a regulator, a battery, a load devices and L iS the b y. R1 is a cut-out relay, a series winding of said cut-out S a Connected in Series With the Series relay, a series winding of said regulator, these two w ndi of the ulato a d R2 a resistance in windings being arranged between the dynamo and 50 series with the series winding of the cut-out ret point t h h id battery is connected in yparallel to each other, load-devices in series with y Switching the Variable resistance R1 in Se-- the series winding of the cut-out relay, a constant r eS w t Series Winding D of the egu resistance arranged between said battery and said the latter can e pt the e r Va o Sizes load devices, said load devices being arranged 55 between the series winding of the cut-out relay and said constant resistance, which is in series with the latter.

2. In a generator battery charging system, in combination a dynamo, a regulator, a battery, a cut-out relay, a series winding of said cut-out relay, a series winding of said regulator, these two windings being arranged between the dynamo and the point to which said battery is connected 10 in parallel to each other, a variable resistance in series with said series winding of the regulator adapted to suit the size of the cut-out relay, load devices in series with the series winding of the cut-out relay, a constant resistance arranged between said battery and said load devices, said load devices being arranged between the series winding of the cut-out relay and said constant resistance, which is in series with the latter.

J AKOB BOHLI. 

